JPH10100905A - Coupling and removing device for towed vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coupling and removing device which can be automatically coupled even when vehicles are not stopped, which is not damaged and unaffected by travelling even the vehicles contact obstruction, and which can be automatically disconnected. SOLUTION: An arm assembly 10L is supported on a frame body 5 which is supported on a horizontal supporting shaft 25 and energized in a horizontal state, through a vertical supporting shaft 26. The arm assembly 10L is provided with an engaging notch 13, energized to a lateral position by a return spring 24 to be engaged with and coupled to a rod of a carriage facing the travel path. After coupling to the rod, the arm assembling is pulled backward, and after it is passed through a position holding pin unit 50L, it is regulated to return by the pin to hold its position. Far-disconnection, a cam roller 45 of a disk 44 driven by a motor, pushes a cam lever 21 formed integrally with the fram body to turn the frame body around the horizontal supporting shaft 25 to raise the top part of the arm assembly and to disengage the arm assembly from the rod. The arm assembly is also disengaged from the pin to return to laterally faced position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an attaching / detaching device for connecting and disconnecting a towing vehicle, such as a towing vehicle, to and from a bogie.

[0002]

2. Description of the Related Art For example, in an assembly plant, parts and finished products are mounted on a trolley and transported by a towing vehicle for transferring parts and finished products between a warehouse and a production line. In factories, it is strongly demanded to reduce various man-hours, and it is desirable that the connection and disconnection of the towing vehicle and the bogie be automated as much as possible to reduce labor.

[0003] As a conventional attaching / detaching device that automatically connects and disconnects such a towing vehicle with a bogie, for example, FIG.
There is something like that shown in In this embodiment, a horizontally extending arm 83 is fixed to the upper end of a shaft 82 that rises vertically from a base 81 installed on a towing vehicle 80, and a rod 84 that extends downward is provided at the tip of the arm 83. A drive mechanism by a motor is provided in the base 81,
The shaft 82 can be rotated and vertically extended and contracted.
Accordingly, the arm 83 pivots around the shaft, and the rod 84 at the tip thereof moves up and down. On the other hand, a hook ring 87 is provided at the front of the carriage 86.

In connection, the truck 86 is set and arranged so that the hook ring 87 faces the traveling path of the towing vehicle 80, and the towing vehicle raises the arm 83 to the right or left and raises it. In this state, the vehicle approaches the set position of the cart 86. In particular, as shown in FIG. 11A, when the truck 86 reaches the set position, the towing vehicle 80 stops and lowers its arm 83. As a result, the rod 84 at the tip of the arm is engaged with the hook ring 87 of the truck, and the towing vehicle 80 and the truck 86 are connected. After the towing vehicle is connected to the bogie, the arm 83 is driven to turn rearward when the towing vehicle starts running, and stops at the point directly behind as shown in FIG. The carriage 86 is towed while being aligned substantially forward and backward along the traveling direction of the towing vehicle 80.

[0005] When the truck reaches the transport destination, FIG.
, The towing vehicle 80 drives the arm 83 to raise it. As a result, the rod 84 at the tip of the arm is disengaged from the hook ring 87 of the bogie, and the bogie and the towing vehicle are separated from each other. Thereafter, the towing vehicle travels independently. As described above, the connection and disconnection of the bogie and the towing vehicle are performed by the motor driven arm 83.
By controlling the motor drive wirelessly or the like, the present invention can be applied to a self-propelled vehicle in a factory to improve efficiency.

[0006]

However, in the above-mentioned conventional attaching / detaching device, the connection between the truck and the towing vehicle is made by the engagement of the descending rod of the towing vehicle with the hook ring of the truck. Must be once stopped, and if the positions are not aligned, the rod cannot penetrate the hook ring and cannot be engaged.
In order for the rod to correctly descend into the hook ring, there is a problem that extremely high precision is required both at the front and rear and left and right stopping positions of the towing vehicle and at the setting position of the bogie.

In order to improve the speed of the connecting operation, it is desirable that the arm of the towing vehicle be extended in advance at least while approaching the vicinity of the set truck, but the arm is driven by a drive mechanism by a motor to freely rotate. Since the robot cannot move, it cannot perform an evacuation operation when it comes into contact with an obstacle on the traveling road. Therefore, there is a problem that the attachment / detachment member including the arm is damaged, or the traveling itself of the towing vehicle is affected, the traveling vehicle deviates from the traveling track, and in some cases, the traveling becomes impossible.

[0008] Therefore, in view of the above-mentioned conventional problems, the present invention does not require the towing vehicle to stop for connection.
In addition, we provide a towing vehicle attachment / detachment device that does not require high precision in setting the position of towed vehicles such as bogies, and that does not damage equipment members even if it comes into contact with obstacles or affect the traveling of towed vehicles The purpose is to do.

[0009]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a frame supported on a fixed side so as to be rotatable about a horizontal support shaft, and a tip supported rotatably about a vertical support shaft on the frame. Arm member having an engaging portion with a connecting member of the towed vehicle in the portion,
Frame body urging means for urging the frame body to a horizontal state, arm urging means for urging the arm member to the sideways position, position holding means for allowing the arm member to pass to the rearward position and restricting return, Drive means for rotating the frame around the lateral support shaft in a direction to raise the tip of the arm member at the rearward position, wherein the engaging portion engages with the connecting member of the towed vehicle at the lateral position of the arm member. The engaging portion is connected to the connecting member by passing through the connecting member position, and the arm member is rotated to the rearward position by towing, while the engaging portion of the arm member is turned by the operation of the driving means. It is configured to be detached from the connecting member of the towed vehicle.

The driving means may be a cam mechanism comprising a cam lever extending from the frame and a cam roller which is displaced by being driven by a motor. Further, the lateral support shaft is supported by a side plate provided on a substrate fixed to the towing vehicle,
The frame urging means preferably includes a stopper provided on the side plate and a spring for pressing the cam lever against the stopper. Further, the arm biasing means may include a return spring provided between the arm member and the frame.

The position holding means includes a pin holder fixed to a fixed side, a pin held by the pin holder and biased so that a tip end protrudes from an upper end of the pin holder, and includes a pin and a rear edge of an arm member. It is preferable that an inclined surface is formed on one of the surfaces, and the pin is pushed in by the inclined surface to allow passage of the arm member.

The connecting member of the towed vehicle is a rod,
The engagement portion of the arm member is an engagement notch, the engagement notch has a holding portion connected to the opening thereof, and the arm member is provided with a pressing means crossing the engagement notch, and the rod is pressed on the holding portion. It is desirable to keep. Further, the arm member can be a right arm member and a left arm member. At that time, both arm members can be supported on the vertical support shaft with their bosses overlapped in the axial direction.

[0013]

Before the connection, the frame is urged horizontally by the frame urging means and is supported by the horizontal support shaft. The arm member supported by the vertical support shaft of the frame is urged to a lateral position by arm urging means. In this state, while the towing vehicle is traveling, the engaging portion at the tip end of the arm member engages with the connecting member of the towed vehicle set at a predetermined position on the traveling path. The arm member whose tip is pulled by the connecting member of the towed vehicle rotates around the vertical support shaft against the arm urging means,
After passing through the position holding means, it becomes the rearward position, where the return is regulated by the position holding means, the rearward position is maintained, and the connected state is maintained. In detachment, by actuating the driving means, the frame is rotated about the horizontal support shaft, and the tip of the arm member at the rearward position is raised. Thereby, the engagement between the engaging portion of the arm member and the connecting member of the towed vehicle is released, and the connection is released. At the same time, the restriction by the position holding means is released, and the arm member returns to the lateral position by the arm urging means.

Since the driving means is a cam mechanism including a cam lever extending from the frame and a cam roller which is driven and displaced by a motor, the amount of rotation of the frame required for separation can be easily obtained. The configuration is simple if the lateral support shaft is supported by a side plate provided on the substrate, and the stopper provided on the side plate and a spring for pressing the cam lever against the stopper are used as frame urging means. Similarly, the arm biasing means can be easily configured by providing a return spring between the arm member and the frame.

The position holding means includes a pin holder fixed to the fixed side, a pin held by the pin holder and biased so that a tip end protrudes from an upper end of the pin holder. By forming the inclined surface on either side, the pin is easily pushed in by the inclined surface, the arm member can pass without great resistance, and the pin protrudes immediately after passing and the return of the arm member can be prevented. .

Further, the connecting member of the towed vehicle is a rod, and the arm member is provided with an engagement notch having a holding portion and a pressing means, so that the rod is pressed and held by the holding portion, and is engaged with the rod during towing. Will not come off. In addition, the right arm member and the left arm member can be connected to each other even if the towed vehicle is set on the left or right side of the traveling path by extending the right and left sides. When the left and right arm members are provided, the bosses are overlapped in the axial direction and supported on the vertical support shaft, thereby simplifying the structure.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to examples. 1 and 2 are a side view and a plan view, respectively, of the apparatus of this embodiment. The vehicle is installed at the rear end of the self-propelled vehicle, with the right side in the figure facing the front of the self-propelled vehicle (not shown) as a towing vehicle and the left side facing rearward. FIG. 3 is a front view as seen from the rear of the self-propelled vehicle. In the attachment / detachment device 1, side plates 3 and 4 are provided on the substrate 2 so as to be laterally opposed to each other, and the arm unit assembly 5 is rotatably supported by the side plates 3 and 4 via the horizontal support shaft 25. ing.

The arm unit assembly 5 includes a frame 6 having a U-shaped cross section in which an upper plate 8 and a lower plate 9 extend from above and below a back plate 7, and left and right arm assemblies 10L and 10R. The left arm assembly 10L includes a boss 11L,
It has an arm plate 12L extending from the boss 11L, and the arm plate 12L is formed at its tip with an engagement notch 13 that engages with a rod of a towed arm of a bogie as a towed vehicle to be described later. A leaf spring 18 is provided as a pressing means that crosses the engagement notch 13.

The engagement notch 13 is open in the forward traveling direction of the vehicle, and has a guide inclined portion 14 having a wide entrance side of the front edge a of the arm plate.
15 The engagement notch 13 has a width enough to accommodate the rod gently after reaching the depth of the guide inclined portion.
The holding portion 16 extends in the direction of the front end L and returns to the front edge a side by a predetermined amount. The rods entering from the guide inclined portions 14 and 15 deform the leaf spring 18 and
Is to be reached.

Similarly, the right arm assembly 10R
The arm plate 12R has an arm plate 12R extending from the boss 11R. The arm plate 12R has an engagement notch 13 formed at a tip end thereof, and a leaf spring 18 crossing the engagement notch. The shape of the engagement notch and the leaf spring in the right arm assembly 10R is symmetrical to the shape of the engagement notch and the leaf spring in the left arm assembly 10L. The description will be made with reference to FIG.

The left arm assembly 10L extends leftward, the right arm assembly 10R extends rightward, and the boss 11L of the left arm assembly is raised upward.
The frame 6 is rotatably supported by the vertical support shaft 26 between the upper plate 8 and the lower plate 9 with the bosses 11 </ b> R of the right arm assembly facing down and both bosses overlapped. The upper plate 8, the lower plate 9, the boss 11
A spacer is interposed between L and 11R so that smooth rotation can be obtained. Further, return springs 24, 24 are provided between the left and right arm assemblies 10R, 10L and the side plates 3, 4, respectively.

The arm unit assembly 5 has a bearing block 20 fixed to the back plate 7 of the frame 6, and the above-mentioned lateral support shaft passes through the bearing block. The back plate 7 of the frame 6 is provided with a cam lever 21 extending further forward and projecting from the front ends of the side plates 3 and 4. A spring 28 is disposed between the cross beam member 27 stretched between the upper edges of the side plates 3 and 4 and the cam lever 21, and the arm unit assembly 5 is urged counterclockwise in FIG. When the cam lever 21 contacts the stopper 29 stretched between the front ends of the left and right arm assemblies 10L, 10L, 10L, as shown in FIG.
The vertical support shaft 26 supporting the R is biased and held in a state where it is vertical, that is, the left and right arm assemblies are horizontal. The spring 28 and the stopper 29 constitute frame urging means of the present invention.

In this state, the left and right arm assemblies 10L, 10R are connected to the return spring 24,
The front end of each arm plate 12L, 12R abuts against the rear edge c of the side plates 4, 3 near the bosses 11L, 11R, while the front end of the arm plate 12B is urged in the direction of rotating forward by the 24. Each is held at a position extending in the lateral direction.
Return springs 24, 24 are shown only in FIG. 2 and are omitted in other figures. In addition, stoppers 30 and 31 are provided at the rear ends of the upper plate 8 and the lower plate 9 of the frame 6 of the arm unit assembly 5 so that the arm assemblies 10L and 10R do not move beyond the rearward direction to the opposite side. ing. The return springs 24, 24 and the rear edges c of the side plates 4, 3 constitute the arm urging means of the present invention.

A reducer 42 connected to a motor 40 via a joint 41 is provided on the front side of the side plates 3 and 4, and a disk 44 having a cam roller 45 is attached to an output shaft 43 of the reducer 42. The cam roller 45 is
It comes into contact with the cam lever 21 of the arm unit assembly 5. A cam inclined surface 22 on which a cam roller 45 rolls with the rotation of the disk 44 is formed at the tip of the cam lever 21.
Are set so that a pivot angle of the arm unit assembly 5 sufficient for separating the carriage described later can be obtained.

A detection cam plate 46 for detecting the rotational position of the output shaft 43 is attached to the output shaft of the speed reducer 42 opposite to the disk 44, and the cam follower 4.
A switch 47 including 8 is provided on the substrate 2. The motor 40 is controlled by a detachment control device (not shown),
The output signal of the switch 47 is used as an input signal of an attachment / detachment control device for stopping the cam roller 45 at a position immediately before contact with the cam lever 21 as shown in FIG. . Here, the cam lever 21, the motor 40, the speed reducer 42, the disc 4
4 and the cam roller 45 constitute the driving means of the invention.

Behind the side plates 3 and 4, position holding pin units 50L and 50R are fixedly provided on the substrate 2 as position holding means for holding the position of the arm assembly in a towed state described later. . As shown in FIG. 4, the arm plates 12L and 12R of the left and right arm assemblies have an inclined surface 19 formed on the lower surface of the rear edge b of the portion that passes through the position holding pin unit during rotation. .

A position holding pin unit 50L for the left arm unit assembly 10L is provided in a pin holder 51 having a small-diameter hole 52 on the upper side in the axial direction and a large-diameter hole 53 on the lower side, as also shown enlarged in FIG. It is configured to house the pin 55. The pin 55 has a large diameter portion 57 corresponding to the large diameter hole 53 at the lower end of the shaft portion 56 corresponding to the small diameter hole 52. The pin 55 is urged upward by a spring 58 disposed in the large-diameter hole 53 of the pin holder 51, so that the large-diameter portion 5
7 is brought into contact with the step portion between the small diameter hole 52 and the large diameter hole 53, and the tip protrudes from the upper end of the pin holder 51. Pin 55
The tip of is chamfered.

The height of the pin 55 and the pin holder 51 is
In the horizontal state of the arm unit assembly 5 shown in FIG. 1, when the arm assembly 10L is rotated, after the tip of the pin 55 is climbed over by the inclined surface 19 on the lower surface of the trailing edge, the arm assembly 10L is to be returned by the return spring 24. The front edge a of the arm plate is
It is set to abut on the side. The same applies to the position holding pin unit 50R for the right arm assembly 10R, and only the left position holding pin unit 50L and the height correspond to the difference in height between the left and right arm assemblies on the vertical support shaft 26. Is different. The right arm plate 12R is provided with a notch 60 for avoiding interference with the left position holding pin unit 50L when the arm assembly 10R faces directly backward.

The attachment / detachment device 1 constructed as described above has a vertical support shaft 26 for supporting the arm assemblies 10L and 10R.
On the center line S of the self-propelled vehicle.
The self-propelled vehicle is equipped with an automatic travel control device that can automatically travel on a specified prescribed route including the transport section according to the guidelines laid in the factory, and the motor of the detachable device is mounted as described above. It has a detachable control device for controlling. The guideline is provided with a marker indicating a connection or disconnection point (section).

Next, the operation of the attaching / detaching device 1 will be described. First, at the time of connection, as shown in FIG.
The vehicle travels in the direction indicated by the arrow with 0R extended right beside. When approaching the connection point, the self-propelled vehicle detects the marker and can slightly decrease the traveling speed if necessary. Hereinafter, the self-propelled vehicle is not shown. On the other hand, the truck to be towed is set to be lateral to the traveling path of the self-propelled vehicle, and is set with the towed arm 70 provided at the front end thereof facing the traveling path.

When the vehicle reaches a position where the arm assembly 10R is aligned with the towed arm 70 of the bogie, the rod 71 of the towed arm 70 is inserted into the engagement notch 13 of the arm assembly 10R as shown in FIG. enter in. On this occasion,
Even if the position of the rod 71 is slightly shifted away from the self-propelled vehicle, the guide inclined portion 14 ensures that the rod 71 is taken into the engagement notch 13. Further, even if the position of the rod 71 is shifted to the side approaching the self-propelled vehicle and the guide 71 is disengaged, the rod 71 pushes the front edge a of the arm plate 12R to rotate the arm assembly 12R obliquely, and eventually, It is taken into the joint notch 13.

Since the arm assembly 10R is provided with the leaf spring 18 that crosses the engagement notch 13, the rod 71 deforms the leaf spring 18 as the self-propelled vehicle advances, and moves the arm assembly 10R backward. Start turning. In this way, as shown in FIG. 7, the bogie on which the towed arm 70 is pulled via the rod 71 starts to follow while changing its direction. In the meantime, the rod 71 further deforms the leaf spring 18 and moves deeper into the engagement notch 13,
It fits in the holding unit 16.

Thereafter, when the self-propelled vehicle further advances, the arm assembly 10R is further rotated by the pulling force from the truck following the vehicle, and the arm assembly is in a position directly behind as shown in FIG. The arm assembly 10R moves the pin 55 against the spring 58 in the pin holder 51 by the inclined surface 19 (see FIG. 4) of the arm plate 12R from the position shown in FIG.
Is pushed downward to pass over the position holding pin unit 50R.

When the arm assembly 10R reaches the position shown in FIG. 8, as shown in FIG. 9, the position holding pin unit 50R
Pins 55 project again. Since no inclined surface is formed on the front edge a side of the arm plate 12R, the arm assembly 10R engages with the pin 55 of the position holding pin unit to move to the right position as shown by the phantom line in FIG. Is held back, and this rearward position is maintained until disconnection described later. The stopper 31 provided on the lower plate 9 of the frame 6 of the arm unit assembly 5
Restricts rotation to the left, opposite to R. Since the bogie-side rod 71, which is accommodated in the holding portion 16 of the engagement notch 13 of the arm assembly 10R, is pressed against the holding portion 16 by the leaf spring 18 during towing, various vibrations and external forces are applied. However, the engagement does not come off.

In this way, the bogie is towed with the arm assembly 10R aligned with the center line of the self-propelled vehicle, and when the vehicle reaches the next separation point, the self-propelled vehicle detects the marker and proceeds to the separation process. Here, the attachment / detachment control device is a motor 40
To rotate the disk disk 44 attached to the output shaft 43 of the speed reducer 42. The cam roller 45 on the disk 44 pushes the cam lever 21, thereby causing the arm unit assembly 5 to move as shown in FIG.
Rotates around the horizontal support shaft 25 in the clockwise arrow direction.

As a result, the engagement notch 13 at the tip of the arm assembly 10R and the rod 7
1 is disengaged, and the self-propelled vehicle and the bogie are separated. At the same time, the arm assembly 10R is disengaged from the engagement with the pin 55 of the position holding pin unit 50R, so that the return spring 24 (see FIG. 2) returns to the sideways state shown in FIG. Thereafter, the motor 40 is driven and stopped until the cam roller 45 on the disk 44 reaches the position shown in FIG.

The case where the bogie is connected and towed using the right arm assembly 10R has been described above. The same applies to the case where the bogie is connected and towed by the left arm assembly 10L. The rotation of the left arm assembly 10L to the opposite side beyond the position directly behind is restricted by the stopper 30 provided on the upper plate 8 of the frame 6, and the return to the left position during towing is performed by the pin of the position holding pin unit 50L. 55.

In this embodiment, the arm assemblies 10L and 10R each having an engagement notch 13 at the distal end thereof, which can be engaged with the bogie rod 71, are urged to a rotatable and sideways position. Position holding pin units 50L and 50R are provided for supporting the arm assembly 6 to the rearward position and for restricting the return of the arm assembly 6 to the rear. The arm assembly is rotated by a cam mechanism operated by a motor drive. By turning the tip upward, the engagement with the rod is released and the arm assembly is released from the position holding pin unit.
The self-propelled vehicle can automatically connect to and disconnect from the bogie while traveling. Further, after the disconnection, the arm assembly returns to the horizontal position again, so that the next connection preparation is automatically completed. Further, the arm assembly 10
Since L and 10R are urged to the horizontal position by the return springs 24 and 24, when they come into contact with an obstacle during traveling, they rotate to prevent damage to both and also affect the operation of the self-propelled vehicle. Nothing.

Further, since the arm assemblies 10L and 10R are extended to both the left and right sides, even if the bogie is set on either side of the traveling path of the self-propelled vehicle, it can be automatically connected, and the layout of the factory, the traveling route, etc. The degree of freedom is large. Further, a leaf spring 1 is provided in the engagement notch 13 of the arm assembly.
Since the rod 8 is provided, the engaged rod 71 is securely held, and the connection is not disconnected due to vibration or the like. The pressing means provided in the engagement notch 13 is not limited to a leaf spring, but may be any suitable means such as a coil spring or a combination of a coil spring and another.

In the connecting portion, an engagement notch is provided on the arm assembly and a rod is provided on the towed arm of the bogie. On the contrary, a rod is provided on the arm assembly, and the engagement notch is provided on the towed arm. Even if provided, the same operation and effect can be obtained. Further, the inclined surface 19 is formed on the lower surface of the rear edge of the arm plate for passing the position holding pin unit of the arm assembly. However, the passage can be made possible by providing the inclined surface only on the pin of the position holding pin unit. In addition, the processing of the arm plate can be omitted.

Further, in the embodiment, the heights of the left and right arm assemblies are different. However, if the right and left arm assemblies are bent at the positions slightly apart from the boss to have the same height, the left and right position holding pin units having the same size can be used. Alternatively, the left and right arm assemblies may be supported by independent support shafts instead of being supported by a common vertical support shaft. In the embodiment, the arm assembly is extended to both the left and right. However, the present invention is not limited to this, and it goes without saying that only one side may be used. Furthermore, in the embodiment, the rear edge c of the side plate functions as a stopper for holding the arm assembly in the horizontal position, but a stopper may be provided on the frame itself instead.

[0042]

As described above, the present invention provides a frame which is rotatable about a horizontal support shaft and is urged in a horizontal state, and which has an engaging portion and which is rotatable about a vertical support shaft and is in a horizontal position. An arm member biased to, a position holding means for allowing the arm member to pass to the rearward position and restricting the return, and a driving means for rotating the frame in a direction to raise the distal end of the arm member in the rearward position. By engaging the engaging portion and the connecting member of the towed vehicle at the lateral position of the arm member, holding the arm member at the rearward position during towing, and raising the arm member by driving means Since it is assumed that the engagement is released, it has the effect of being able to automatically connect and disconnect with the towed vehicle while traveling, and after the disconnection, the arm member returns to the horizontal position again, so that the next connection preparation is automatically made Complete It has the effect of.

Furthermore, since the arm member is biased to the lateral position but is rotatable, the arm member is securely connected even if the set position of the connecting member of the towed vehicle is slightly shifted. In addition, even if an obstacle comes in contact with the towing vehicle, both damages are prevented, and no deviation from the traveling path occurs.

Further, the connecting member of the towed vehicle is a rod, and the arm member is provided with an engagement notch having a holding portion and a pressing means, so that the rod is pressed and held by the holding portion and is engaged with the rod during towing. Will not come off. Also, by extending the right arm member and the left arm member left and right as arm members, automatic connection is possible even when the towed vehicle is set on either the left or right side of the traveling path, and the layout of the factory, traveling route, etc. Has a merit that a great degree of freedom can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a plan view of the embodiment.

FIG. 3 is a front view of the embodiment.

FIG. 4 is an enlarged view showing details of a position holding pin unit and a unit passing portion of an arm assembly.

FIG. 5 is a plan view showing a setting state of a detachable device and a towed arm of a bogie before connection.

FIG. 6 is a plan view showing a state in which the rod of the towed arm has entered the engagement notch of the arm assembly during the connecting process.

FIG. 7 is a plan view showing a state in which the rod is set in the holding portion of the engagement notch during the connection process.

FIG. 8 is a view showing a state in which the connection is completed and the arm assembly is held right behind.

FIG. 9 is a side view showing a state where connection is completed.

FIG. 10 is an explanatory diagram showing a separating operation.

FIG. 11 is a diagram showing a conventional example.

[Explanation of symbols]

 Reference Signs List 1 attachment / detachment device 2 board 3, 4 side plate 5 arm unit assembly 6 frame 7 back plate 8 upper plate 9 lower plate 10L, 10R arm assembly 11L, 11R boss 12L, 12R arm plate 13 engagement notch 14, 15 guide inclined portion DESCRIPTION OF SYMBOLS 16 Holding part 18 Leaf spring 19 Inclined surface 20 Bearing block 21 Cam lever 22 Cam inclined surface 24 Return spring 25 Horizontal support shaft 26 Vertical support shaft 27 Cross beam 28 Spring 29 Stopper 30, 31 Stopper 40 Motor 41 Joint 42 Reduction gear 43 Output Shaft 44 Disk disk 45 Cam roller 46 Detection cam plate 47 Switch 48 Cam follower 50L, 50R Position holding pin unit 51 Pin holder 55 Pin 58 Spring 60 Notch 70 Towed arm 71 Rod 80 Tow truck 81 Base 82 The trailing edge of the edge c plate after the leading edge b arm plate Yafuto 83 arm 84 rod 86 carriage 87 hook ring a arm plate

Claims (8)

[Claims] 1. A frame (6) supported on a fixed side (2) so as to be rotatable about a horizontal support shaft (25), and supported by the frame so as to be rotatable about a vertical support shaft (26). Arm members (10L, 10R) each having an engagement portion (13) with a connecting member of a towed vehicle at a distal end portion; and frame body urging means (28, 29) for urging the frame body in a horizontal state. Arm urging means (3, 4, 24, 2) for urging the arm member to a lateral position.
4), position holding means (50L, 50R) for allowing the arm member to pass to the rearward position and restricting the return, and the lateral support for supporting the frame body in a direction to raise the tip end of the arm member at the rearward position. Driving means (21, 40, 42, 45) for rotating about an axis, wherein the engaging portion is engageable with the connecting member (71) of the towed vehicle at a lateral position of the arm member. The engaging portion is connected to the connecting member by passing through the connecting member position, and the arm member is turned to the rearward position by towing, while the engaging portion of the arm member is operated by the driving means. An attachment / detachment device for a towed vehicle, wherein the device is configured to be detached from a connecting member of the towed vehicle. 2. A cam mechanism comprising a cam lever (21) extending from the frame (6) and a cam roller (45) driven and displaced by a motor (40). Item 2. An attachment / detachment device for a towing vehicle according to Item 1. 3. The lateral support shaft (25) is supported by side plates (3, 4) provided on a substrate (2) fixed to a towing vehicle, and the frame urging means is provided on the side plate. The stopper (29) provided and the cam lever (21)
3. A detachable device for a towing vehicle according to claim 2, further comprising a spring (28) for pressing the towing vehicle. 4. The arm urging means includes a return spring (24, 24) provided between the arm member (10L, 10R) and a side plate (3, 4). 4. The detachable mounting device for a towing vehicle according to 1, 2, or 3. 5. The fixing device according to claim 5, wherein the position holding means is provided on the fixed side.
And a pin (55) held by the pin holder and urged so that the tip protrudes from the upper end of the pin holder, and provided after the pin and the arm members (12L, 12R). 4. The device according to claim 1, wherein the slanted surface is formed at one of the edges, and the pin is pushed in by the slanted surface to allow passage of the arm member. Or a detachable device for a towing vehicle according to 4. 6. A connecting member of the towed vehicle is a rod (7).
1), wherein the engagement portion of the arm member is an engagement notch (13), the engagement notch has a holding portion (16) connected to the opening thereof, and the arm member has The towing vehicle according to claim 1, 2, 3, 4, or 5, wherein a pressing means (18) crossing the joint notch is provided, and the holding portion is configured to press and hold the rod. Detachable device. 7. The arm member according to claim 1, wherein the arm member is a left arm member.
And a right arm member (10R). 7. The detachable device for a towing vehicle according to claim 1, 2, 3, 4, 5, or 6. 8. The traction apparatus according to claim 7, wherein the left arm member and the right arm member are supported by the vertical support shaft with their bosses (11L, 11R) overlapped in the axial direction. Vehicle attachment / detachment device.